module 2: 4.2 acid-base titration Flashcards
acid-bas titration 2.1.4, 2.1.3
1
Q
define the term titration
A
a titration is a technique used to accurately measure the volume of one solution that reacts exactly with another solution
2
Q
what can titrations be used for:
A
- finding the concentration of a solution
- identification of unknown chemicals
- finding the purity of a substance
3
Q
define standard solution
A
a solution of known concentration
4
Q
tolerance of a 100 cm^3 volumetric flask
A
+- 0.20 cm^3
5
Q
tolerance of a 250 cm^3 volumetric flask
A
+- 0.30 CM^3
6
Q
uncertainty of a 10 cm^3 pipette
A
+- 0.04 cm^3
7
Q
uncertainty of a 25 cm^3 pipette
A
+- 0.06 cm^3
8
Q
uncertainty of a 50cm^3 burette
A
+- 0.10 cm^3
9
Q
how do you record a burette reading
A
it is measured to the nearest +- 0.05 cm^3. this means that the last digit will be a 5 or 0
10
Q
how to work out the mean titre
A
only use concordant results (results that are within 0.10 cm^3 of each other)
